Support, especially financial.
A backdrop.
The mounting of a horse or other animal.
The action of putting something back; a switching into reverse.
A liner or other material added behind or underneath.
Musicians and vocalists who support the main performer.
Providing support for the main performer.
Active help from a person, organization, etc., such as an orderly sharing of space or resources.
The act of cooperating.
Association for mutual benefit, such as for purposes of production or purchase.